Re: [Xen-devel] [PATCH v2 01/11] kexec: introduce kexec_ops struct

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 22/11/12 17:47, H. Peter Anvin wrote:
> The other thing that should be considered here is how utterly 
> preposterous the notion of doing in-guest crash dumping is in a system 
> that contains a hypervisor.  The reason for kdump is that on bare metal 
> there are no other options, but in a hypervisor system the right thing 
> should be for the hypervisor to do the dump (possibly spawning a clean 
> I/O domain if the I/O domain is necessary to access the media.)
>
> There is absolutely no reason to have a crashkernel sitting around in 
> each guest, consuming memory, and possibly get corrupt.
>
>       -hpa
>

I agree that regular guests should not be using the kexec/kdump. 
However, this patch series is required for allowing a pvops kernel to be
a crash kernel for Xen, which is very important from dom0/Xen's point of
view.

-- 
Andrew Cooper - Dom0 Kernel Engineer, Citrix XenServer
T: +44 (0)1223 225 900, http://www.citrix.com


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